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Cognomen Islak (Islak ) , globally, is quite a rare last name. The family name Islak is habitual in Turkey, where it is quite a rare surname, Germany, where it is a rare surname, and Malaysia, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in Turkey, India, and Germany. Likewise, Islak is the forename as well as the last name.